Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0037—Containers
  • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
  • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0037—Containers
  • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
  • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
  • B05B11/00442—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being actuated by the difference between the atmospheric pressure and the pressure inside the container
• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
  • A45D34/00—Containers or accessories specially adapted for handling liquid toiletry or cosmetic substances, e.g. perfumes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1028—Pumps having a pumping chamber with a deformable wall
  • B05B11/1033—Pumps having a pumping chamber with a deformable wall the deformable wall, the inlet and outlet valve elements being integrally formed, e.g. moulded
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1028—Pumps having a pumping chamber with a deformable wall
  • B05B11/1035—Pumps having a pumping chamber with a deformable wall the pumping chamber being a bellow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1043—Sealing or attachment arrangements between pump and container
  • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1043—Sealing or attachment arrangements between pump and container
  • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
  • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1066—Pump inlet valves
  • B05B11/1067—Pump inlet valves actuated by pressure
  • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring

Definitions

• the invention relates to a discharge head for a liquid dispenser to m discharge of pharmaceutical or cosmetic liquids and a liquid dispenser which is provided with such a discharge head.
• Generic discharge heads have a deformable pumping chamber component which is arranged between a base and an actuating pusher, so that its internal volume in cooperation with an inlet valve and an outlet valve forms a pumping chamber, the contents of which can be discharged by depressing the actuating pusher.
• generic discharge heads can consist of only three components, since the inlet and outlet valves and any ventilation valve, if present, can be formed by valve lips or valve bodies provided in one piece on the pump chamber component together with a counter-wall of the base or the actuating lever.
• the object of the invention is to develop a generic discharge head in such a way that it exhibits an advantageous behavior when venting the pumping chamber during commissioning and for venting the liquid reservoir during use.
• a discharge head which has a base and an actuating lever which can be depressed in an actuating direction between an unactuated end position and an actuated end position relative to the base.
• the proposed discharge head has a liquid inlet for connection to a liquid reservoir and a discharge opening for dispensing liquid in an environment.
• a pump device is provided for conveying liquid from the liquid reservoir to the discharge opening.
• This pumping device has a deformable pumping chamber component that is open on both sides and that is attached to the base and the actuating lever and surrounds a variable-volume pumping chamber that has an inlet valve in the direction of the liquid reservoir and an outlet valve in the direction of the discharge opening.
• the discharge head also has at least one ventilation opening which penetrates the base and to which a ventilation valve is assigned.
• the ventilation opening and the ventilation valve allow the subsequent flow of air into the liquid reservoir in order to allow pressure equalization after liquid has been removed.
• the ventilation valve has a circumferential ring web on the base, which rises above a surrounding, radially extending cover wall of the base and the inside of which forms a circumferential valve surface for contacting a valve lip.
• Said circumferential valve surface is provided on the base, which is inherently or by the coupling to a fluid reservoir in a state of tension that can act on the valve surface and allows the reproducibility of the shape of the valve surface.
• the cover wall is preferably at least 50% thicker than in the opposite inner and outer area of the cover wall.
• the reinforcement structure is preferably arranged opposite to an area of an underside of the top wall on which, after the fluid reservoir has been coupled, a storage tube zen or bottle neck of the liquid reservoir is applied.
• the reinforcement structure is preferably arranged at least partially opposite a clear cross section of the storage connection or bottle neck. The reinforcement structure can thus at least partially absorb a voltage coupled into the base from the storage nozzle or bottle neck and thus not allow it to reach the annular web and the valve lip there, or only to a small extent.
• the second measure which is preferably provided together with the reinforcement structure mentioned, is that the circumferential ring web is part of a sleeve-shaped structure which forms the circumferential ring web above the top wall and which extends in alignment over the adjacent top wall below its planes and there forms a circumferential wall section aligned with the ring web.
• the top wall goes on the inside into a sleeve shape that forms the ring web with the valve surface above the level of the top wall and forms the circumferential wall section below the top wall. This preferably merges into a circumferential annular wall, which is pierced by at least one ventilation opening.
• the circumferential wall section can in particular also facilitate the coupling with the liquid reservoir and serve as a guide. When the discharge head is fastened to the liquid reservoir, the wall section preferably protrudes into the bottle neck or storage connector of the liquid reservoir.
• the said sleeve-shaped structure brings about a significant stabilization of the position of the valve surface.
• the reinforcement structure mentioned it is achieved that even a very strong state of tension in the outer area of the base, for example due to the discharge head being screwed on too tightly, does not negatively affect the opening properties of the ventilation valve.
• a discharge head is proposed, in particular a discharge head of the type described above with an improved ventilation valve, which also includes the mentioned elements of the base and the depressible actuating lever and the liquid inlet, the discharge opening and the deformable pump chamber component with an inlet valve that is open on both sides and outlet valve formed pumping device.
• the discharge head has at least one ventilation opening which penetrates the base and to which a ventilation valve is assigned.
• This ventilation valve has a circumferential ring web on the base, the inside of which forms a valve surface. It also has a valve lip which is formed in one piece with the pump chamber component and which rests circumferentially on the valve surface when the ventilation valve is closed.
• the base has an inlet connector which forms the liquid inlet and onto which a fastening section of the pump chamber component is pushed.
• This inlet connector for its part, has a support structure with at least one outward-facing and non-circumferential support surface, which comes into contact with the pump chamber component at least towards the end of the depression of the actuation lever and thereby causes a contact force with which the valve lip rests on the valve surface, extensively is not uniform.
• the inlet connector is the carrier of the pump chamber component and thus also of the vent lip of the ventilation valve provided thereon.
• a negative pressure in the liquid reservoir does not result in a uniform application of force to the valve lip all around. It has been shown that such a uniform application of force on the one hand makes opening more difficult and more difficult to calculate, especially if the valve lip has an expanding shape, with a straight line between a contact surface at the distal end of the valve lip and valve lip root on the pump chamber component with the Direction of actuation encloses an angle between 30 ° and 60 ° and thus has a high inherent rigidity.
• the circumferential uniformity of the application of force can cause fluttering on the sealing lip and thus undesirable noise development.
• the non-uniformity caused by the support structure prevents this, since it leads to an area of the valve lip with an increased tendency to open. A reproducible opening without noise development can be achieved hereby.
• the support structure has a plurality of support surfaces, preferably between 2 and 12, in particular between 4 and 8, which are uniform over the circumference are distributed.
• the areas of increased tendency to open are to be found between these support surfaces.
• the support structure can have a rib or a plurality of ribs, the end faces of which facing in the direction of the actuating lever form the support faces. These ribs can simultaneously effect a partial stiffening of the base, which counteracts the aforementioned deformation of the valve surface of the ventilation valve.
• the at least one ventilation opening can preferably be arranged circumferentially between these ribs.
• a discharge head is proposed, in particular a discharge head of the type described above with an improved ventilation valve, which in turn includes the mentioned elements of the base and the depressible actuating lever and the liquid inlet, the discharge opening and the deformable pump chamber component with an inlet valve that is open on both sides and outlet valve formed pumping device.
• Said outlet valve has a circumferential annular web which projects down from an inside end wall of the actuating pusher in the direction of the base, the outside of which forms a circumferential valve surface.
• the discharge head On the inside of this, the discharge head has an additional displacement structure projecting down from the inside face of the actuating pusher, this displacement structure having a receiving space which is open in the direction of the pump chamber and which is laterally closed by a surrounding wall.
• the displacement structure is separated from the ring web, preferably by a circumferential recess.
• the displacement structure reduces the pumping chamber volume, and especially when using a bellows as the main shape of the pumping chamber component, this reduction does not affect the usable pumping chamber volume, i.e. the amount of liquid that can be discharged with one actuation stroke, but only the unusable remaining volume of the pumping chamber.
• the displacement structure provides an area for receiving residual air through the receiving space it forms. In this the air, which is difficult to expel, collects in the pump chamber, which ensures that it does not reach the outlet valve, or only to a lesser extent, and interferes with its function.
• the surrounding wall of the displacement structure preferably extends over the annular web into the pump chamber. While the annular web itself can only have a limited extent in the direction of the base due to the shape of the pump chamber component, in particular in its configuration as a bellows, the displacement structure can extend further into the pump chamber in the actuation direction.
• the pumping chamber has a maximum volume which is defined by the interior of the pumping chamber between the inlet valve and the outlet valve when the actuating lever is arranged in the unactuated end position.
• the receiving space has a receiving space volume V A , wel Ches is formed by that partial volume of the pump chamber which is enclosed within the surrounding wall.
• the ratio between the receiving space volume V A and the pump chamber volume Vp Max is preferably between 1:50 and 1:10.
• a discharge head is proposed, in particular a discharge head of the type described above with an improved ventilation valve, which also includes the mentioned elements of the base and the depressible actuating lever and the liquid inlet, the discharge opening and the deformable pump chamber component with an inlet valve that is open on both sides and outlet valve formed pumping device. It is provided that the discharge head has at least one ventilation opening which penetrates the base and to which a ventilation valve is assigned, which has a circumferential valve lip which is integrally formed on the ver malleable pump chamber component and which is biased outward on a circumferential valve web the base.
• a protective lip is provided, which is also formed in one piece on the deformable pump chamber component and is arranged on the outside of the valve lip in order to protect the valve lip.
• the protective lip protrudes above the valve lip preferably both radially and axially.
• the purpose of the protective lip is, in particular, to protect the valve lip of the ventilation valve during the action prior to assembly as bulk material.
• the valve lip is designed as a conical valve lip with a shape that widens towards the contact surface, the Ven tillippe is particularly at risk. It has been shown that sometimes barely visible damage due to direct injury and relaxation in the deformed state can significantly unexpectedly affect the reproducibility of the behavior of the valve lip when the discharge head is used.
• a discharge head which, in accordance with the designs described, has the mentioned elements of the base and the depressible actuation pusher as well as the liquid inlet, the discharge opening and the pumping device formed by a deformable pumping chamber component open on both sides with an inlet valve and an outlet valve having.
• the discharge head has at least one ventilation opening which penetrates the base and to which a ventilation valve is assigned.
• This has a circumferential valve lip which is integrally formed on the ver moldable pump chamber component and which is biased outwardly against a circumferential valve web of the base.
• the circumferential valve lip radially projecting tilting leg is provided, which is integrally formed on the pump chamber component.
• a button pointing in the direction of the tilting arm is provided on the actuating lever, which in the actuated end position exerts force on the tilting arm and thereby lifts the valve lip of the ventilation valve from the valve web or facilitates a pressure-related lift-off of the valve lip from the Ven tilsteg.
• Ventilation can be forced or at least promoted in such a way that even a slight negative pressure in the bottle is sufficient to open the ventilation valve when the actuating lever is depressed.
• Said tilting limb which is preferably designed as a tilting collar running around, is integrally connected to the pump chamber component. It is provided on the pump chamber component in such a way that the sealing lip, which is also integrally connected to the pump chamber component, is subjected to force when the tilting limb is depressed by the actuating lever.
• Said positive opening or simplified opening allows the ventilation valve to be designed in such a way that it only opens forcibly in this way or only opens when there is considerable negative pressure in the bottle.
• a particularly leak-proof ventilation valve can therefore be created. Since the positive opening takes place when the actuating lever is depressed, i.e. before the return stroke and the suction of liquid in the pumping chamber that takes place, a slight negative pressure can arise in the liquid reservoir after the return stroke, which, however, is equalized at least for a short time at the latest during the next actuation.
• the invention also includes a liquid dispenser for dispensing pharmaceutical or cosmetic liquids which has a liquid reservoir and a dispensing head for conveying liquid from the liquid reservoir into an environment.
• the discharge head is designed according to one of the preceding claims.
• the liquid reservoir is preferably a ventilated liquid reservoir formed by rigid walls, which is ventilated through the said ventilation opening in the discharge head so that the inflowing air comes into direct contact with the liquid.
• a ventilated liquid reservoir formed by rigid walls, which is ventilated through the said ventilation opening in the discharge head so that the inflowing air comes into direct contact with the liquid.
• Such a design usually has a riser pipe on the discharge head, which protrudes from its base into the liquid reservoir.
• a design is also conceivable in which a bag in which the liquid is stored is provided within the rigid wall of the liquid reservoir. The ventilation he does not follow into this bag, but into a surrounding space within the rigid wall of the liquid reservoir. With such a bag system, depending on the design, a riser pipe can be dispensed with.
• the liquid reservoir is filled with a pharmaceutical or cosmetic liquid.
• a pharmaceutical or cosmetic liquid In particular, it can be a highly viscous liquid in the form of a gel or a foam.
• Fig. 1 shows a liquid dispenser according to the invention in an overall view.
• Fig. 2 shows the discharge head according to the invention of the liquid dispenser according to FIG. 1 in a sectional representation.
• FIG. 3 shows the essential components of the discharge head in an exploded view.
• Fig. 4 illustrates the special structure of the basis for ensuring a reproducible opening behavior of a vent valve of the discharge head.
• Fig. 5 to 6B illustrate the deformation of a valve lip of the ventilation valve during the Belüf device.
• Fig. 7 shows the internal structure of the actuating lever of the discharge head.
• 10A and 10B show a second variant of a discharge head, in the non-actuated and in the actuated state.
• Fig. 1 shows a liquid dispenser 100 for dispensing pharmaceutical or cosmetic liquids, for example for dispensing a shower gel.
• the liquid dispenser 100 has a liquid reservoir 110 and a discharge head 10, which is fastened by means of a thread or some other connection technology to a bottle neck or storage connector of the liquid reservoir 110.
• the discharge head 10 has a base 20 and an actuating lever 50 which can be depressed relative to the base 20 in the direction of an actuating direction 2.
• a discharge opening 52 is provided on this.
• a pumping device provided in the discharge head 10 is actuated, which pumps liquid from the liquid reservoir 110 to the discharge opening 52.
• FIG. 2 the discharge head 10 is shown in more detail. With reference to this FIG. 2 and the exploded view of FIG. 3, the elements are explained in detail.
• the main elements of the discharge head 10 are the already mentioned base 20, the actuating pusher 50 and a pump chamber component 80, which is provided for attachment to both the base 20 and the actuating pusher 50 and which provides a pumping chamber wall in the form of a bellows 81.
• the pump chamber component 80 made of an elastically deformable plastic is fastened by means of a sleeve-shaped fastening section 82 in a clamped manner on a clamping surface 40 of an inlet connector 32 of the base 20, this being clamped Inlet stub 32 is penetrated by a liquid inlet 22.
• the pump chamber component 80 is fastened with a fastening flange 84 on the actuating lever 50, this attachment being carried out on the inside of a circumferential fastening web 68 of the actuating lever 50.
• the pump chamber component 80 forms a total of three valves.
• An inlet valve 14 is provided at the upper end of the inlet port 32.
• the pump chamber component 80 has an elastically deflectable hemispherical valve body 88 which is pressed against the liquid inlet 22 and opens when there is negative pressure in the pump chamber 13.
• the pumping chamber component 80 has a valve lip 86 which rests on the outside of an annular web 72 of the actuating lever 50. In the event of excess pressure in the pump chamber 13, the valve lip 86 is deflected, in particular in the area of the discharge opening 52, so that liquid can flow to the discharge opening 52 and into a surrounding atmosphere.
• the third valve which is formed by the pump chamber component 80, is a ventilation valve 18. This is formed on the one hand by a circumferential valve web 42 of the base 20 and its inwardly pointing valve surface 44 and on the other hand by a conically widening valve lip 90 of the pump chamber component 80. At its free end, this valve lip has a contact surface 94 for contact with the valve surface 44.
• the ventilation valve 18 separates a surrounding atmosphere from an annular space surrounding the inlet connector 32, which is connected to an interior space of the liquid reservoir 110 via ventilation openings 28. If the pressure in the liquid reservoir 110 and thus also in the annular space is lower than an ambient pressure, the ventilation valve 18 opens in that the valve lip 90 loses contact with the valve surface 44 at least partially.
• the discharge of liquid takes place in that the actuating pusher 50 is depressed by applying force to an actuating surface 54, so that the bellows 81 of the pump chamber component 80 is compressed and the liquid contained therein flows to the outside through the discharge opening 52 after opening the outlet valve 16. If the actuating pusher 50 is then released, it returns to its starting position of FIG. 2 with the re-deformation of the previously elastically tensioned pump chamber component 80, the outlet valve 16 being closed and the inlet valve 14 opening instead, so that liquid from the liquid reservoir 110 can flow into the pump chamber 13.
• the ventilation valve 18 is provided so that no negative pressure arises in the liquid reservoir 110 after liquid has been removed, which would prevent liquid from flowing into the pump chamber 13. This opens in the event of negative pressure in the liquid reservoir 110, in that the contact surface 94 on the side of the valve lip 90 opposite the valve lip root 92 lifts off the valve surface 44 and thus allows ambient air to flow in.
• FIG. 4 shows the base 20 in a separate illustration in a sectional illustration.
• An internal thread 34 is provided on the base 20, by means of which the base is attached to a thread of the liquid storage device 110. If the discharge head 10 is screwed tightly onto the liquid reservoir 110, there is a risk that a top wall 24 of the base 20 stretching the bottleneck of the liquid reservoir 110 is put under tension in a way that worsens the opening properties of the ventilation valve 18, in particular the contact pressure of the contact surface 94 of the valve lip 90 on the valve surface 44 lowers in such a way that the ventilation valve 18 remains open permanently and loss of liquid is to be feared here, or the contact pressure is increased in such a way that the ventilation valve 18 does not open reliably, so that in the liquid reservoir 110 can build up a negative pressure.
• the base of the discharge head has two measures to prevent such a stress state.
• a reinforcement structure 26 in the form of a circumferential web is provided on the upper side of the cover wall 24. This is located in the radial direction above that surface against which an uppermost edge of the bottle neck is pressed when the base 20 is screwed onto the bottle neck. It has been shown that such a reinforcement causes a decoupling, so that the stress state that is created can only reach a small extent as far as the valve web 42 and can therefore only deform it to a small extent.
• the second measure is that the circumferential valve web 42 continues below the plane of the top wall 24 and here forms a circumferential wall section 46 that is aligned with it.
• valve web 42 and the Wan extension section 46 together form a sleeve shape. This also counteracts the deformation of the valve web 42. Even if the base 20 is improperly screwed onto the bottle neck of the liquid reservoir 110, the behavior of the vent valve 18 hardly changes.
• 5 and 6A and 6B illustrate a further aspect with regard to the ventilation valve 18.
• the valve lip 90 of the ventilation valve 18 has a conical shape with a widening in the direction of the con having contact surface 94 of the valve lip 90.
• a support structure 36 with ribs 39 is provided in the manner shown in FIG. 5 on the outside of the A lassstutzens 32, each of which forms support surfaces 38 on its top.
• These support surfaces 38 favor the valve opening, since in the area of the support surfaces 38 a deformation of the valve lip 90 is made more difficult, so that at the same time in the circumferential areas between two ribs 39 with support surfaces 38 the deformation of the valve lip 90 is favored and here at least compared to that caused by the support surfaces 38 supported areas is facilitated.
• FIGS. 6A and 6B show this, the figures each showing the base 20 and, of the pump chamber component 80, only the valve lip 90.
• FIG. 6A shows the state of the closed ventilation valve 18.
• the valve lip 90 is also shown separately here again for better understanding.
• the contact surface 94 rests against the valve surface 44 on the outside and has a rotationally symmetrical shape.
• FIG. 7 shows the actuation lever 50 in a separate illustration and with a perspective from below into the actuation lever 50.
• the outer fastening web 68 can be seen, on the inner side of which the fastening flange 84 of the pump chamber component 80 is fixed.
• an annular web 72 is provided, the outer surface of which forms the valve surface 74 on which the valve lip 86 of the outlet valve 16 rests in the idle state.
• a displacement structure 60 is provided on the end wall 56 of the actuating lever 50.
• This Ver displacement structure 60 serves the purpose of reducing the pumping chamber volume.
• FIG. 8 and 9 show the pump chamber component in an isolated illustration, the pump chamber component being shown in section in FIG. 9, while it is shown as a whole in FIG. 8.
• valve lip 90 assigned to the inlet valve 14 is protected in a special way against injuries prior to assembly.
• the pump chamber component 80 is preferably handled as bulk material during assembly, that is, a large number of such pump chamber components 80 are handled without a defined alignment with one another, for example transported and supplied.
• common storage and common transport in a large bag with a large number of pump chamber components 80 are common.
• There is a very high risk that an injury to the contact surface 94 at the distal end of the valve lip 90 will result in the ventilation valve remaining permanently open during operation.
• FIGS. 10A and 10B show a second exemplary embodiment of a discharge head 10 according to the invention. Except for the detail mentioned below, this is essentially identical to the embodiment of the previous figures. The only difference is that the fastening web 68, on the inside of which the upper end of the pump chamber component 80 is fastened, already extends significantly further in the direction of the lower end of the pump chamber component 80 in the rest state of FIG. 10A.
• This construction is chosen so that an end face closing off the fastening web 68 at the lower end can act as a button 70 which, when the actuating lever 50 is depressed, forcibly opens the ventilation valve 18 or at least reduces the contact pressure of the contact surface 94 of the valve lip 90 and the valve surface 44 in such a way that the opening of the ventilation valve 18 for the purpose of producing the pressure equalization can be guaranteed.
• Fig. 10B shows this effect.
• the lower end position of the actuating lever 50 is shown.
• the button 70 presses on the outside of a tilting collar 98, which is also the carrier of the protective lip 96 described above.
• the arrows 4 make this clear.
• the deformation of the tilting collar 98 caused here results in the valve lip 90 attached to the inner end of this tilting collar 98 becoming detached from the valve surface 44.
• the arrows 6 make this clear.
• This opening works particularly well if, in accordance with the previous embodiment and in particular FIG. 5 there, said ribs 39 with their respective support surfaces 38 are provided.
• the ventilation valve 18 is opened as a result. If a negative pressure still remains in the liquid reservoir 110 from a previous actuation, it is equalized at this moment. It is true that during the return stroke of the actuating lever 50, a renewed negative pressure may arise in the liquid storage tank. However, this is not sufficient to prevent liquid from being sucked into the pump chamber 13 during the return stroke. The next time you press the button, the negative pressure in the liquid reservoir is again equalized.

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• Closures For Containers (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

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Citations (11)

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• 2019
  • 2019-05-06 EP EP22205622.8A patent/EP4151317A1/de active Pending
  • 2019-05-06 EP EP19172799.9A patent/EP3736049B1/de active Active
• 2020
  • 2020-05-04 WO PCT/EP2020/062342 patent/WO2020225223A1/de active Application Filing
  • 2020-05-04 US US17/606,259 patent/US11938495B2/en active Active
  • 2020-05-04 CN CN202080033938.7A patent/CN113747978B/zh active Active
  • 2020-05-04 KR KR1020217039950A patent/KR20220003103A/ko not_active Application Discontinuation

Patent Citations (11)

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